Dwyer Instruments' Model 8904 Integral Vane Thermo-Anemometer is designed to simultaneously measure air velocity and temperature. The 1.3-inch (34-millimeter) display allows users to view readings. User-selectable wind speed units include ft/min, m/sec, knots, mph and km/hr. A built-in sensor records ambient temperature in °F or °C. Model 8904 features include data hold; the ability to record minimum, maximum and average readings on a single point; and an RS-232 interface setting. The units are designed to record and average up to two hours of data while displaying the continuous running average.

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